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F3-phase 3-wire Y connection AC voltage controller Resistive load,90°≤a<150° VT VT VT VT VTVTVT VT 5 TVT"ⅵ T VTVT VT"VTVT 6 5兀 怀23 47 17Power Electron cs i 17 3 -phase 3 phase 3 -wire Y connection wire Y connection AC voltage controller AC voltage controller Resistive load, 9 Resistive load, 9 0 ° ≤ α < 150 ° α π 4 π 3 2 π 3 5 π 3 π 3 0 2 π u ao' u a u ab 2 u ac 2 VT 5 VT 1 VT 3 VT 4 VT 6 VT 2 VT 6 VT 5 VT 5 VT 1 VT 3 VT 5 VT 4 VT 2 VT 4 VT 6
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